OBD codes / P0058
P0058
ModerateO2 Sensor Heater Control Circuit High (Bank 2, Sensor 2)
Feel free to keep driving with P0058 — it has no effect on how the engine makes power or manages fuel. Consider it a to-do item with two motivators: passing your next emissions inspection, and restoring the check-engine light's ability to warn you about anything new.
What this code means
The sensor behind this code is the downstream oxygen sensor on Bank 2: it lives after the catalytic converter on the cylinder bank opposite cylinder 1, which is why the code turns up on V-type and flat engines and not on most inline-4s. Every O2 sensor carries an internal heater so it can reach its several-hundred-degree working temperature seconds after a cold start — for a downstream sensor, that means converter monitoring can begin early in the drive. P0058 sets when the heater control circuit shows higher voltage than the computer expects, which classically traces to wiring shorted to battery voltage or to excess resistance from corroded terminals or a degrading heater element. Underbody connectors that have taken on water and corroded are a recurring real-world source of exactly this fault. The engine's fueling never depends on this sensor, so there are no drivability symptoms — just the light, and a converter monitor that can't finish its homework.
Symptoms you might notice
- Check-engine light and nothing else you can feel
- No performance, idle, or economy changes
- Failed emissions inspection while the code is active
What it costs to fix
Typical range: $125–$400 · about ~0.3–1.2 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Downstream oxygen (O2) sensor | $30–$200 | ~0.3–1.2 hrs |
| Wiring / connector repair | $10–$120 | ~0.5–1.5 hrs |
| Heater-circuit fuse | $1–$10 | ~0.1–0.3 hrs |
Typically one of the cheaper O2 repairs: an inexpensive downstream sensor plus under-an-hour labor when access is good. The bill rises with seized threads on rusty exhausts or when the fault is a corroded connector that needs a repair pigtail spliced in.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0058 for my exact vehicle →
Frequently asked
What causes the 'high' reading behind P0058?
Two main things: a wire in the heater circuit touching battery voltage where it shouldn't, or resistance creeping into the circuit through corroded connector pins or an aging heater element. Both make the control circuit read higher than the computer expects when it operates the heater.
Is P0058 safe to ignore on a road trip?
For the trip itself, yes — nothing about this fault worsens with miles or threatens reliability. Sort it out when you're back, both for emissions compliance and so the warning light is available again to flag genuinely urgent problems.
Could P0058 really be my catalytic converter failing?
No — this code is strictly about the heater electrical circuit in the monitoring sensor, not the converter's performance. Converter trouble announces itself with efficiency codes (like the P0430 family for Bank 2), which are diagnosed very differently.
Any tips for fixing P0058 myself?
Start under the car with a visual check: unplug the sensor connector and look for green corrosion, water, or melted insulation before condemning the sensor. If the connector is clean and the fuse is good, replace the sensor with an O2 socket — and put anti-seize on the new threads unless they come pre-coated.
Seeing P0058 on your car? Get a diagnosis specific to your exact year, make and model.
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Generic OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.